Display screen or portion thereof with graphical user interface



The sole FIGURE is a front view of the claimed design of a display screen or portion thereof with a graphical user interface.

The outermost broken lines in the FIGURE illustrate a display screen or portion thereof and form no part of the claimed design. The other broken lines in the FIGURE illustrate portions of the graphical user interface that form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen or portion thereof with graphical user interface, as shown and described. 